Security agencies reportedly thwarted a plot to assassinate British Prime Minister Theresa May last week. In a joint operation of British intelligence agency MI5 and the Metropolican Police, two men, aged 20 and 21, were detained on November 28, according to The Guardian. They will be produced in a court in London on Wednesday.

The police said they charged the duo with “the intention of committing acts of terrorism” and “engaging in conduct in preparation for giving effect to that intention”.

According to security officials, the alleged Islamist plot involved using an explosive to blow up the gates of Downing Street, then enter No. 10 – the prime minister’s official residence – and assassinate her.

MI5 chief Andrew Parker shared details of the alleged terror plot at a meeting with Cabinet members on Tuesday, according to The Telegraph. Parker reportedly said British intelligence agencies had foiled nine terror plots in the past 12 months.